parsing events output

lib/event.js

@@ -90,14 +90,18 @@ var getArgumentsObject = function (inputs, indexed, notIndexed) {
     }, {}); 
 };
  
-
 var outputParser = function (event) {
     
     return function (output) {
         var result = {
             event: utils.extractDisplayName(event.name),
-            number: output.number
+            number: output.number,
+            args: {}
         };
+
+        if (!output.topic) {
+            return result;
+        }
        
         var indexedOutputs = filterInputs(event.inputs, true);
         var indexedData = "0x" + output.topic.slice(1, output.topic.length).map(function (topic) { return topic.slice(2); }).join("");
@@ -112,8 +116,20 @@ var outputParser = function (event) {
     };
 };
 
-module.exports = {
-    inputParser: inputParser,
-    outputParser: outputParser
+var getMatchingEvent = function (events, payload) {
+    for (var i = 0; i < events.length; i++) {
+        var signature = abi.eventSignatureFromAscii(events[i].name); 
+        if (signature === payload.topic[0]) {
+            return events[i];
+        }
+    }
+    return undefined;
+};
+
+
+module.exports = {
+    inputParser: inputParser,
+    outputParser: outputParser,
+    getMatchingEvent: getMatchingEvent
 };